WO2016006465A1 - Machine rotative hydraulique - Google Patents

Machine rotative hydraulique Download PDF

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Publication number
WO2016006465A1
WO2016006465A1 PCT/JP2015/068372 JP2015068372W WO2016006465A1 WO 2016006465 A1 WO2016006465 A1 WO 2016006465A1 JP 2015068372 W JP2015068372 W JP 2015068372W WO 2016006465 A1 WO2016006465 A1 WO 2016006465A1
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WO
WIPO (PCT)
Prior art keywords
passage
shaft
working fluid
radial
casing
Prior art date
Application number
PCT/JP2015/068372
Other languages
English (en)
Japanese (ja)
Inventor
竜乃介 石川
義博 大林
Original Assignee
Ｋｙｂ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ｋｙｂ株式会社 filed Critical Ｋｙｂ株式会社
Priority to AU2015288847A priority Critical patent/AU2015288847A1/en
Priority to CN201580035929.0A priority patent/CN106471249A/zh
Priority to US15/324,443 priority patent/US20170159639A1/en
Priority to EP15819257.5A priority patent/EP3168470A4/fr
Publication of WO2016006465A1 publication Critical patent/WO2016006465A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0639—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
    • F03C1/0642—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined on main shaft axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0644—Component parts
    • F03C1/0663—Casings, housings
    • F03C1/0665—Cylinder barrel bearing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/22—Reciprocating-piston liquid engines with movable cylinders or cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2064—Housings
    • F04B1/2071—Bearings for cylinder barrels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/22—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B3/00—Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08—Cooling; Heating; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/18—Lubricating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
    • F04B9/115—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by two single-acting liquid motors, each acting in one direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B3/00—Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage
    • F04B3/003—Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage with two or more pistons reciprocating one within another, e.g. one piston forning cylinder of the other
    • F04B3/006—Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage with two or more pistons reciprocating one within another, e.g. one piston forning cylinder of the other with rotating cylinder block

Definitions

  • the present invention relates to a hydraulic rotating machine using water as a working fluid.
  • JP8-247021A discloses a hydraulic axial piston pump having a shaft supported by a bearing and a cylinder block connected to the shaft by a spline and discharging water as a working fluid.
  • the hydraulic piston pump described in JP8-247021A does not have a structure that actively cools sliding parts such as bearings and spline coupling parts. For this reason, the temperature of the sliding part rises due to frictional heat, and the members constituting the sliding part are liable to be melted or cause abnormal wear, which is a factor of reducing the durability of the pump.
  • the present invention aims to improve the durability of a hydraulic rotating machine.
  • a hydraulic rotating machine that uses water as a working fluid, and includes a plurality of pistons, a plurality of cylinders that accommodate the pistons, a rotating cylinder block, and the cylinder block penetrating.
  • a shaft coupled to the cylinder block; a swash plate that reciprocates the piston so as to expand and contract the volume chamber of the cylinder as the cylinder block rotates;
  • a discharge passage through which a fluid is guided and an end face of the one end of the shaft are opened on the shaft center.
  • a directional passage a first radial passage drilled in the radial direction of the shaft from the axial passage to guide the working fluid into the casing, and a guide for guiding the working fluid into the casing.
  • the second radial passage drilled in the radial direction of the shaft from the axial passage on the one end side of the shaft with respect to the first radial passage, and the high pressure of the supply passage and the discharge passage.
  • FIG. 1 is a cross-sectional view of a hydraulic rotating machine according to an embodiment of the present invention.
  • FIG. 2 is a sectional view of the hydraulic rotating machine according to the embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of a modified example of the hydraulic rotating machine according to the embodiment of the present invention.
  • the hydraulic rotating machine is a hydraulic piston pump motor 100 using water as a working fluid
  • the hydraulic piston pump motor 100 functions as a pump for supplying water, which is a working fluid, by rotating the shaft 1 and reciprocatingly moving the shaft 1 by power from the outside, and by the fluid pressure of water supplied from the outside.
  • the piston 6 reciprocates and the shaft 1 rotates, it functions as a motor that outputs a rotational driving force.
  • Piston pump 200 is a hydraulic piston pump that uses water as a working fluid.
  • the piston pump 200 includes a shaft 1 that is rotated by a power source, a cylinder block 2 that is connected to the shaft 1 and rotates as the shaft 1 rotates, and a casing 3 that houses the cylinder block 2.
  • the casing 3 has a case main body 3a that is open at both ends, an end cover 5 that supports one end 1a of the shaft 1 and closes one open end of the case main body 3a, and the other end 1b of the shaft 1 that passes through the case main body 3a.
  • a front cover 4 that closes the other opening end of the first cover.
  • the one end 1 a of the shaft 1 is accommodated in an accommodation recess 5 a provided in the end cover 5.
  • the other end 1b of the shaft 1 projects outside from the front cover 4 and is connected to a power source.
  • the shaft 1 has a flange portion 1c formed so as to project radially from the outer peripheral surface in the radial direction.
  • the flange portion 1 c is accommodated in the front cover 4 and restricts relative movement of the shaft 1 and the front cover 4 in the axial direction.
  • the cylinder block 2 has a through hole 2a through which the shaft 1 passes, and is splined to the shaft 1 at the connecting portion 31. Thereby, the cylinder block 2 rotates as the shaft 1 rotates.
  • a plurality of cylinders 2b having openings on one end face are formed in parallel with the shaft 1.
  • the plurality of cylinders 2 b are formed with a predetermined interval in the circumferential direction of the cylinder block 2.
  • a cylindrical piston 6 that partitions the volume chamber 7 is inserted into the cylinder 2b so as to freely reciprocate.
  • the front end side of the piston 6 protrudes from the opening of the cylinder 2b, and a spherical seat 6a is formed at the front end.
  • the piston pump 200 further includes a shoe 8 that is rotatably connected to the spherical seat 6 a of the piston 6, and a swash plate 9 that the shoe 8 is in sliding contact with the rotation of the cylinder block 2.
  • the shoe 8 includes a receiving portion 8 a that receives a spherical seat 6 a formed at the tip of each piston 6, and a circular flat plate portion 8 b that is in sliding contact with the swash plate 9.
  • the inner surface of the receiving portion 8a is formed in a spherical shape and is in sliding contact with the outer surface of the received spherical seat 6a. Thereby, the shoe 8 can be angularly displaced in any direction with respect to the spherical seat 6a.
  • the swash plate 9 is fixed to the inner wall of the front cover 4 and has a sliding contact surface 9 a inclined from a direction perpendicular to the axis of the shaft 1.
  • the flat plate portion 8b of the shoe 8 is in surface contact with the sliding contact surface 9a.
  • the front cover 4 is formed with a through hole 4a through which the shaft 1 is inserted, a housing portion 4b that houses the flange portion 1c of the shaft 1, and a lead-out passage 18 that communicates the housing portion 4b and the inside of the case body 3a. Is done.
  • a first bearing 20 that rotatably supports the shaft 1 and the flange portion 1c is accommodated in the through hole 4a and the accommodating portion 4b.
  • the first bearing 20 is interposed between the pair of cylindrical portions 20 a interposed between the front cover 4 and the shaft 1 and the flange portion 1 c of the front cover 4.
  • a pair of annular portions 20b projecting annularly in the radial direction from the end portions.
  • the pair of cylindrical portions 20a supports the shaft 1 so as to be rotatable.
  • the pair of annular portions 20b are formed so as to sandwich the flange portion 1c from both sides thereof, and rotatably support the flange portion 1c by opposing surfaces facing each other.
  • the front cover 4 rotatably supports the shaft 1 via the first bearing 20.
  • the front cover 4 is further formed with a cylindrical extending portion 4c extending along the shaft 1 toward the cylinder block 2 side.
  • the 2nd bearing 21 is inserted in the outer peripheral surface of the extension part 4c, and is fixed by the pin member etc. which are not shown in figure.
  • a cylindrical sliding contact portion 2c that is in sliding contact with the second bearing 21 is formed in the cylinder block 2 that is positioned opposite to the outer peripheral surface of the extending portion 4c. Since the inner peripheral surface of the sliding contact portion 2 c is in sliding contact with the outer peripheral surface of the second bearing 21, the cylinder block 2 is rotatably supported by the front cover 4.
  • the end cover 5 is provided with a supply passage 10 that guides water sucked into the volume chamber 7 and a discharge passage 11 that guides water discharged from the volume chamber 7.
  • the end cover 5 further includes a third bearing 22 that fits into the inner peripheral surface of the housing recess 5a.
  • the end cover 5 rotatably supports one end 1 a of the shaft 1 accommodated in the accommodating recess 5 a via the third bearing 22.
  • the first to third bearings 20 to 22 are sliding bearings and are formed of resin, ceramic, DLC (Diamond Like Carbon) or the like.
  • the materials of the first to third bearings 20 to 22 may be any material as long as the slidability can be ensured even when the working fluid is water.
  • the piston pump 200 further includes a valve plate 12 interposed between the cylinder block 2 and the end cover 5.
  • the valve plate 12 is a disc member with which the base end surface of the cylinder block 2 is in sliding contact, and is fixed to the end cover 5.
  • the valve plate 12 is formed with a supply port 12a connecting the supply passage 10 and the volume chamber 7, a discharge port 12b connecting the discharge passage 11 and the volume chamber 7, and a through hole 12c through which the shaft 1 passes. .
  • the inside of the casing 3 is filled with water, and a first inner space 28 defined by the through hole 2 a of the cylinder block 2, the outer peripheral surface of the shaft 1, and the valve plate 12, and the sliding contact portion 2 c of the cylinder block 2.
  • Case body 3a excluding the second inner space 29 defined by the inner peripheral surface of the front cover 4, the extended portion 4c of the front cover 4 and the outer peripheral surface of the shaft 1, and the first inner space 28 and the second inner space 29. It is mainly divided into a third internal space 30 which is an internal space of
  • each shoe 8 When the shaft 1 is rotationally driven by power from the outside and the cylinder block 2 rotates, the flat plate portion 8b of each shoe 8 comes into sliding contact with the swash plate 9, and each piston 6 strokes according to the inclination angle of the swash plate 9. It reciprocates in the cylinder 2b by an amount. The volume of each volume chamber 7 is increased or decreased by the reciprocation of each piston 6.
  • Water is guided to the volume chamber 7 which is expanded by the rotation of the cylinder block 2 through the supply passage 10 and the supply port 12a.
  • the water sucked into the volume chamber 7 is increased in pressure by the reduction of the volume chamber 7 due to the rotation of the cylinder block 2 and is discharged through the discharge port 12 b and the discharge passage 11.
  • water suction and discharge are continuously performed as the cylinder block 2 rotates.
  • the introduction passage 13 that connects the discharge passage 11 and the housing recess 5 a is formed.
  • the introduction passage 13 may be formed either inside or outside the end cover 5.
  • a groove serving as the introduction passage 13 may be formed in either the end cover 5 or the valve plate 12, or the discharge passage 11 and the accommodation recess 5 a
  • the end cover 5 may be drilled with a port for connecting the.
  • the introduction passage 13 is provided with an orifice 14 that restricts the amount of water introduced into the casing 3.
  • a first connection passage 23 that is a groove that communicates the housing space 5b of the housing recess 5a and the inside of the casing 3 extends in the axial direction on the inner peripheral surface thereof.
  • a passage that communicates the first internal space 28 with the second internal space 29 or the third internal space 30 is provided as a cylinder block 2 or a valve plate. 12 may be provided.
  • the shaft 1 is opened in the end surface of one end 1 a and is opened on the axial center of the shaft 1.
  • the shaft 1 is formed in the radial direction of the shaft 1 from the axial passage 15 and faces the front cover 4.
  • a first radial passage 16 that opens to the outer peripheral surface of the shaft 1, and an outer peripheral surface of the shaft 1 that is provided on the one end 1 a side of the shaft 1 with respect to the first radial passage 16 and faces the extending portion 4 c of the front cover 4.
  • a second radial passage 17 that is open to the outside. Since the axial passage 15 communicates with the introduction passage 13 through the accommodation space 5 b, the pressurized water is guided to the axial passage 15 through the introduction passage 13.
  • the opening position of the second radial passage 17 is not limited to a position facing the extending portion 4c of the front cover 4, and any position on the shaft 1 as long as water can be supplied to the second internal space 29. There may be.
  • the axial passage 15 is a non-through hole formed in the axial direction of the shaft 1 so as to pass through the axial center from the end surface of the one end 1a of the shaft 1.
  • the first radial passage 16 and the second radial passage 17 are through holes that communicate with the axial passage 15 and are formed in the radial direction that open on the outer peripheral surface of the shaft 1.
  • the first radial passage 16 is formed as two passages that open at positions facing the pair of cylindrical portions 20 a of the first bearing 20, and the second radial passage 17 has a shaft more than the first radial passage 16. 1 is formed on one end 1 a side and is formed as a single passage opening to the second internal space 29.
  • the diameter and the number of the first radial passages 16 and the second radial passages 17 are determined so that the amount of water flowing through both passages is sufficient to cool each part.
  • the first radial passage 16 and the second radial passage 17 the first radial passage 16, the second radial passage 17, the first radial passage 16 and the second diameter are used.
  • Orifices may be placed in any one or more of the axial passages 15 between the directional passages 17. By arranging the orifices in these passages, the amount of water supplied to each of the first bearing 20 and the second bearing 21 can be adjusted, and the first bearing 20 and the second bearing 21 can be appropriately cooled. .
  • a second connection passage 24 that is a radial groove extending in a groove shape in the radial direction is formed on the opposing surfaces of the pair of annular portions 20b of the first bearing 20.
  • the second connection passage 24 communicates with the lead-out passage 18 through the housing portion 4 b of the front cover 4.
  • a third connection passage 25 that is an axial groove extending in a groove shape in the axial direction is formed on the inner peripheral surface thereof.
  • the third connection passage 25 is formed so as to communicate the first radial passage 16 and the second connection passage 24. Accordingly, the first radial passage 16 communicates with the outlet passage 18 through the third connection passage 25 and the second connection passage 24. For this reason, the water guided from the axial passage 15 to the first radial passage 16 and flowing out from the first radial passage 16 is guided to the outlet passage 18 through the third connection passage 25 and the second connection passage 24.
  • the front cover 4 is provided with a sealing material 27 so that water does not leak to the outside from between the shaft 1 and the front cover 4. Therefore, water does not leak outside through the third connection passage 25.
  • the lead-out passage 18 communicates the accommodating portion 4 b and the third internal space 30, the water guided through the second connection passage 24 is guided to the third internal space 30 through the accommodating portion 4 b and the lead-out passage 18. .
  • a fourth connection passage 26 that is an axial groove extending in a groove shape in the axial direction is formed on the outer peripheral surface thereof.
  • the fourth connection passage 26 communicates the second internal space 29 and the third internal space 30. Since the second radial passage 17 is opened in the second internal space 29, the water flowing out from the second radial passage 17 is formed in the second bearing 21 after flowing into the second internal space 29.
  • the third connection space 26 is guided to the third internal space 30.
  • a circulation passage 19 that connects the supply passage 10 and the third internal space 30 is formed between the valve plate 12 and the case body 3a.
  • the circulation passage 19 is a gap formed between the outer peripheral surface of the valve plate 12 and the inner peripheral surface of the case main body 3a. For this reason, the water guided into the third internal space 30 through the first radial passage 16 and the second radial passage 17 circulates to the supply passage 10 through the circulation passage 19.
  • part of the water pressurized by the piston pump 200 circulates in the piston pump 200 and cools each part.
  • the third bearing 22 is cooled by water flowing through the first connection passage 23.
  • the water that has passed through the first connection passage 23 flows into the first internal space 28, and the connection portion 31 between the shaft 1 and the cylinder block 2 adjacent to the first internal space 28, or between the cylinder block 2 and the valve plate 12. Cool the sliding surface.
  • the water introduced into the second internal space 29 cools the connecting portion 31 between the shaft 1 and the cylinder block 2 adjacent to the second internal space 29.
  • the water guided into the second internal space 29 is guided to the third internal space 30 through the fourth connection passage 26 formed in the second bearing 21.
  • the second bearing 21 is cooled by the water flowing through the fourth connection passage 26.
  • the water guided from the second internal space 29 to the third internal space 30 cools the sliding portions of the piston 6, the shoe 8, and the swash plate 9 disposed in the third internal space 30.
  • the water flowing into the axial passage 15 of the shaft 1 flows out from the shaft 1 through the first radial passage 16.
  • the water flowing out from the first radial passage 16 passes through the third connection passage 25 and the second connection passage 24 formed in the first bearing 20, and the accommodating portion 4 b and the outlet passage 18 formed in the front cover 4. It is guided to the third internal space 30.
  • the first bearing 20 is cooled by water flowing through the third connection passage 25 and the second connection passage 24.
  • the water guided to the third internal space 30 cools the sliding portion of each member disposed in the third internal space 30 and then circulates to the supply passage 10 through the circulation passage 19.
  • the water guided to the inside of the shaft 1 passes through the first radial passage 16 and the second radial passage 17 provided on the one end 1a side of the shaft 1 with respect to the first radial passage 16 to the inside of the casing 3. Therefore, sliding parts such as bearings and spline coupling parts can be efficiently cooled at the same time. For this reason, the melting damage and abnormal wear of the sliding portion generated by frictional heat are suppressed, and the durability of the hydraulic piston pump motor 100 can be improved.
  • a groove as a connection passage that constitutes a part of the circulation path is formed in each of the sliding contact surfaces of the first, second, and third bearings 20, 21, and 22.
  • the water circulating in the piston pump 200 simultaneously cools the sliding surfaces of the first, second, and third bearings 20, 21, 22, and functions as a lubricant.
  • wear of the sliding contact surface is reduced, and durability of the first, second, and third bearings 20, 21, 22 can be improved.
  • the frictional resistance of the bearing is reduced and the pump efficiency is improved.
  • the circulation passage 19 is formed between the outer peripheral surface of the valve plate 12 and the inner peripheral surface of the case body 3a.
  • the circulation passage 19 may be configured in any way as long as the inside of the case body 3a communicates with the supply passage 10, for example, a hole formed in the valve plate 12, or an outer peripheral surface of the valve plate 12. It is good also as a groove
  • the circulation passage 19 is formed between the outer peripheral surface of the valve plate 12 and the inner peripheral surface of the case body 3a.
  • a drain port (not shown) provided in the case body 3a may be used as a circulation passage.
  • the water guided into the casing 3 is discharged from the drain port to a tank (not shown).
  • the tank water is again supplied to the piston pump 200 through the supply passage 10.
  • the first radial passage 16 is provided with two through holes penetrating in the radial direction of the shaft 1.
  • the number of the first radial passages 16 may be one, or a plurality of the first radial passages 16 may be formed circumferentially.
  • the number of the second radial passages 17 may be one as long as the axial passage 15 and the second internal space 29 are in communication with each other. The through hole may not be used.
  • connection passage 25 connects the first radial passage 16 and the second connection passage 24.
  • first radial passage 16 may be formed so as to directly communicate with the second connection passage 24.
  • first bearing 20 may or may not be provided with the third connection passage 25 for lubrication.
  • first, second, third, and fourth connection passages 23, 24, 25, and 26 are grooves provided in the bearing.
  • first, second, third, and fourth connection passages 23, 24, 25, and 26 may be gaps formed between the shaft 1 or the cylinder block 2 and the bearing.
  • first, second, third, and fourth connection passages 23, 24, 25, and 26 at least one groove may be provided.
  • the second connection passage 24 may be provided in at least one of the pair of annular portions 20b of the first bearing 20.
  • the third connection passage 25 may be provided in at least one of the pair of cylindrical portions 20a of the first bearing 20.
  • the shaft 1 is formed with a flange portion 1c projecting radially in the radial direction
  • the first bearing 20 is provided with an annular portion 20b that rotatably supports the flange portion 1c.
  • the first bearing 20 may be a cylindrical bearing without forming the flange portion 1c. In this case, a hole or a groove may be formed in the radial direction of the bearing to form the second connection passage 24.
  • the orifice 14 provided in the introduction passage 13 may be a fixed type or a variable type.
  • a variable type the opening of the orifice 14 is adjusted according to the temperature inside the casing 3, and the amount of water guided to the inside of the casing 3 is increased as the temperature inside the casing 3 increases. May be.
  • the swash plate 9 has a fixed angle, but the tilt angle may be changeable.
  • the hydraulic piston pump motor 100 When the hydraulic piston pump motor 100 is used as the piston motor 300, high-pressure water is supplied from the outside to the piston motor 300 through the supply passage, so that the passage through which the high-pressure working fluid flows in the supply passage 10 and the discharge passage 11. Becomes the supply passage 10.
  • the discharge passage 11 communicates with a tank (not shown) through which water discharged from the volume chamber 7 flows.
  • the embodiment shown in FIG. 2 differs from the embodiment shown in FIG. 1 in that the introduction passage 13 is connected to the supply passage 10 and the reflux passage 19 is connected to the discharge passage 11.
  • the water introduced from the supply passage 10 through the introduction passage 13 is introduced into the casing 3 through the axial passage 15 formed in the shaft 1 in the same manner as the piston pump 200 shown in FIG. Cool the part.
  • the water guided into the casing 3 is guided to the discharge passage 11 through the circulation passage 19 and discharged to the tank together with the water discharged from the volume chamber 7. Since other structures and operations are the same as the piston pump 200 shown in FIG.
  • the hydraulic piston pump motor 100 is used as the piston motor 300, the water guided into the shaft 1 is divided into two passages, the first radial passage 16 and the second radial passage 17. Therefore, sliding parts such as bearings and spline coupling parts can be efficiently cooled at the same time. For this reason, the melting damage and abnormal wear of the sliding part generated by frictional heat are suppressed, and the durability of the hydraulic rotating machine can be improved.
  • the introduction passage 13 is connected to both the supply passage 10 and the discharge passage 11 via the selection valve 32, the third internal space 30, the supply passage 10, A passage 19a that communicates with each other, a check valve 33a that is provided in the passage 19a and that allows only water outflow from the third internal space 30 to the supply passage 10, and the third internal space 30 and the discharge passage 11 communicate with each other.
  • a reflux passage is configured by the passage 19b and a check valve 33b provided in the passage 19b and allowing only water outflow from the third internal space 30 to the discharge passage 11. Different from the hydraulic piston pump motor 100 shown.
  • the selection valve 32 has two inlets and one common outlet, the supply passage 10 and the discharge passage 11 are connected to the inlet, and the introduction passage 13 is connected to the outlet. Since the selection valve 32 compares the pressure of water supplied to the two inlets and connects the higher inlet to the outlet, only the passage through which the high-pressure water circulates between the supply passage 10 and the discharge passage 11. Communicates with the introduction passage 13. For this reason, for example, when the hydraulic piston pump motor 100 including the supply passage 10 and the discharge passage 11 is used as a piston pump, the rotation direction of the shaft 1 is switched, and the passage through which pressurized water is discharged is one side.
  • the introduction passage 13 The passage that communicates with the second passage is switched by the selection valve 32 from one passage to the other passage through which high-pressure water flows. That is, in the hydraulic piston pump motor 100 shown in FIG. 3, since the introduction passage 13 is always in communication with the passage through which high-pressure water flows, the high-pressure piston pump motor 100 is always used regardless of how it is used. It becomes possible to guide the water in the casing 3.
  • the reflux passage is constituted by a passage and a check valve.
  • the supply passage 10 and the discharge passage are provided.
  • 11 is a suction passage having a low pressure
  • water introduced into the casing 3 is returned through a check valve connected to the passage serving as the suction passage, and supplied from a tank (not shown). The water is sucked into the volume chamber 7 together with the water.
  • the hydraulic piston pump motor 100 is used as a piston motor, even if the passage for supplying high-pressure water is switched in order to switch the rotation direction of the shaft 1, either the supply passage 10 or the discharge passage 11 is used.
  • the passage serves as a discharge passage communicating with a tank (not shown)
  • the water guided into the casing 3 flows back through a check valve connected to the passage serving as the discharge passage, and is discharged from the volume chamber 7. And return to the tank.
  • the water guided into the casing 3 can be recirculated regardless of how the hydraulic piston pump motor 100 is used.
  • the supply passage 10 becomes a high-pressure passage through which high-pressure water supplied from the outside flows, and the discharge passage 11 communicates with a tank (not shown) and becomes a low-pressure passage through which water discharged from the volume chamber 7 flows. For this reason, the supply passage 10 through which high-pressure water circulates communicates with the introduction passage 13 through the selection valve 32.
  • the water introduced from the supply passage 10 through the introduction passage 13 is introduced into the casing 3 through the axial passage 15 formed in the shaft 1 in the same manner as the piston pump 200 shown in FIG. Cool the part.
  • the water guided into the casing 3 is guided to the discharge passage 11 through which low-pressure water flows through the check valve 33 b provided in the passage 19 b communicating with the discharge passage 11, and is discharged from the volume chamber 7.
  • the water guided into the shaft 1 passes through the two passages of the first radial passage 16 and the second radial passage 17 to the inside of the casing 3. Therefore, the sliding parts such as the bearings and the spline coupling parts can be efficiently cooled at the same time. For this reason, the melting damage and abnormal wear of the sliding part generated by frictional heat are suppressed, and the durability of the hydraulic rotating machine can be improved. Further, in this modification, regardless of the rotation direction of the shaft 1, it is possible to always introduce high-pressure water into the casing 3 regardless of how the hydraulic piston pump motor 100 is used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)

Abstract

La présente invention concerne une machine hydraulique rotative qui est un moteur (100) de pompe à piston hydraulique qui utilise de l'eau comme fluide actif et qui est pourvu : d'un passage axial (15) qui s'ouvre sur la surface d'extrémité d'une première extrémité (1a) d'un arbre (1) qui est relié à un bloc-cylindres (2), et qui est percé sur l'axe central de l'arbre (1) ; d'un premier passage radial (16) qui sert à guider le fluide actif vers l'intérieur d'un carter (3) et qui est percé depuis le passage axial (15) dans la direction radiale de l'arbre (1) ; d'un second passage radial (17) qui est percé depuis le passage axial (15) dans la direction radiale de l'arbre (1) plus vers le côté première extrémité (1a) de l'arbre (1) que le premier passage radial (16) ; et d'un passage d'introduction (13) qui relie le passage axial (15) à un passage par lequel un fluide actif haute-pression s'écoule, ledit passage étant un passage d'alimentation (10) ou un passage de sortie (11).
PCT/JP2015/068372 2014-07-07 2015-06-25 Machine rotative hydraulique WO2016006465A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2015288847A AU2015288847A1 (en) 2014-07-07 2015-06-25 Hydraulic rotary machine
CN201580035929.0A CN106471249A (zh) 2014-07-07 2015-06-25 水压旋转机械
US15/324,443 US20170159639A1 (en) 2014-07-07 2015-06-25 Hydraulic rotary machine
EP15819257.5A EP3168470A4 (fr) 2014-07-07 2015-06-25 Machine rotative hydraulique

Applications Claiming Priority (2)

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JP2014-139544 2014-07-07
JP2014139544A JP2016017430A (ja) 2014-07-07 2014-07-07 水圧回転機

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WO2016006465A1 true WO2016006465A1 (fr) 2016-01-14

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US (1) US20170159639A1 (fr)
EP (1) EP3168470A4 (fr)
JP (1) JP2016017430A (fr)
CN (1) CN106471249A (fr)
AU (1) AU2015288847A1 (fr)
WO (1) WO2016006465A1 (fr)

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US20210254608A1 (en) * 2020-02-13 2021-08-19 Robert Bosch Gmbh Hydrostatic Axial Piston Machine of the Swash Plate Construction Type

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JP2017210943A (ja) * 2016-05-27 2017-11-30 Ｋｙｂ株式会社 流体圧回転機
DE102018200345A1 (de) * 2018-01-11 2019-07-11 Robert Bosch Gmbh Hydromaschine, hydraulisches Aggregat mit der Hydromaschine, und hydraulische Achse mit der Hydromaschine
CN108547765B (zh) * 2018-04-08 2019-11-26 杭州绿聚科技有限公司 一种新型轴向柱塞泵
CN109162916A (zh) * 2018-10-17 2019-01-08 江苏汇智高端工程机械创新中心有限公司 轴向柱塞泵/马达
DE102019113536B4 (de) 2019-05-21 2022-04-21 Danfoss A/S Vorrichtung zur Bereitstellung von Anschlüssen an einen Maschinenbereich einer hydraulischen Maschinenanordnung
JP7374638B2 (ja) * 2019-07-18 2023-11-07 ナブテスコ株式会社 流体機械及び建設機械
CN111520304B (zh) * 2020-04-21 2021-11-02 徐州工业职业技术学院 一种散热效果好的液压泵/马达
DE102021209515A1 (de) * 2021-08-31 2023-03-02 Robert Bosch Gesellschaft mit beschränkter Haftung Hydrostatische Axialkolbenmaschine mit einem Kühlkreislauf und Servo-hydraulischer Aktuator mit einer hydrostatischen Axialkolbenmaschine und mit einem Kühlkreislauf
CN117927439B (zh) * 2024-03-18 2024-08-16 潍柴动力股份有限公司 一种一体式电动泵及车辆

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AU2015288847A1 (en) 2017-02-02
US20170159639A1 (en) 2017-06-08
EP3168470A1 (fr) 2017-05-17
CN106471249A (zh) 2017-03-01
EP3168470A4 (fr) 2018-02-07
JP2016017430A (ja) 2016-02-01

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